Blenheim Grey Brushed Limestone. An extremely hard European Limestone that combines slight surface texture with a blend of light-mid grey tones. Surface mottling, small shells and veining make for a forgiving stone floor that is equally at home in modern or traditional interiors. From Mandarin Stone. www.mandarinstone.com
Paris Grey tumbled limestone kitchen floor tiles. Light grey tones with aged edge, this stone can be installed with underfloorheating systems. http://www.naturalstoneconsulting.co.uk/limestone-paris-grey-limestone
You can get the luxurious look of travertine for the cost of ceramic tile. Using special technology to replicate stone surfaces, the Travisano Collection by Marazzi is both stylish and affordable. The collection comes in a wide variety of sizes, with an assortment of trims and mosaics.